Experimental Analyses of Different PVT Collector Designs for Heating and Cooling Applications in Buildings

Cremers, Jan; Mitina, Irina; Palla, Nansi; Klotz, Fritz; Jobard, Xavier; Eicker, Ursula

doi:10.1016/j.egypro.2015.11.356

Cited by 13 publications

(6 citation statements)

References 4 publications

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“…Cremers et al [16] investigated the potential improvement of the thermal contact between the PV module and thermal absorber in a plastic design, while also reducing thermal losses with rear shielding. Kim and Kim [17] investigated the thermal contact between the PV module and rear absorber for a fully-wetted absorber configuration and for a more conventional sheet-and-tube collector.…”

Section: Introductionmentioning

confidence: 99%

Systematic testing of hybrid PV-thermal (PVT) solar collectors in steady-state and dynamic outdoor conditions

et al. 2019

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Hybrid photovoltaic-thermal (PVT) collectors have been proposed for the combined generation of electricity and heat from the same area. In order to predict accurately the electrical and thermal energy generation from hybrid PVT systems, it is necessary that both the steady-state and dynamic performance of the collectors is considered. This work focuses on the performance characterisation of non-concentrating PVT collectors under outdoor conditions. A novel aspect of this work is the application of existing methods, adapted from relevant international standards for flat plate and evacuated tube solar-thermal collectors, to PVT collectors for which there is no formally established testing methodology at present. Three different types of PVT collector are tested, with a focus on the design parameters that affect their thermal and electrical performance during operation. Among other results, we show that a PVT collector suffers a 10% decrease in thermal efficiency when the electricity conversion is close to the maximum power point compared to open-circuit mode, and that a poor thermal contact between the PV laminate and the copper absorber can lead to a significant deterioration in thermal performance. The addition of a glass cover improves the thermal efficiency, but causes electrical performance losses that vary with the glass transmittance and the solar incidence angle. It is found that the reduction in electrical efficiency at large incidence angles is more significant than that due to elevated temperatures representative of water-heating applications. Dynamic performance is characterised by imposing a step change in irradiance in order to quantify the collector time constant and effective heat capacity. This paper demonstrates that PVT collectors are characterised by a slow thermal response in comparison to ordinary flat plate solar-thermal collectors, due to the additional thermal mass of the PV layer. A time constant of ∼ 8 min is measured for a commercial PVT module, compared to < 2 min for a flat plate solar-thermal collector. It is also concluded that the use of a lumped, first-order dynamic model to represent the thermal mass of the PVT collector is not appropriate under certain irradiation regimes and may lead to inaccurate predictions of the system performance. This paper outlines a procedure for the testing and characterisation of solar collectors, provides valuable steady-state and dynamic performance characterisation data for various PVT collector designs, and also provides a framework for the application of this data in a system model to provide annual performance predictions in a range of geographical settings.

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Section: Introductionmentioning

confidence: 99%

Systematic testing of hybrid PV-thermal (PVT) solar collectors in steady-state and dynamic outdoor conditions

et al. 2019

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“…Compared to very few studies that employed air as the working medium of the PV-PT-RC system, much more works paid attention to the water-based PV-PT-RC system given that water, as the thermal carrier, shows better heat transfer performance [148][149][150][151][152][153][154][155][156][157][158][159][160][161][162][163]. However, the water temperature at the outlet of the PV-PT-RC collector in an opened system can hardly be heated up or cooled down to effective levels due to its large thermal capacity.…”

Section: Water-based Systemsmentioning

confidence: 99%

Applications of radiative sky cooling in solar energy systems: Progress, challenges, and prospects

Zhao

SUHENDRI

et al. 2022

Renewable and Sustainable Energy Reviews

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“…An experimental study was performed by Cremers et al [59] using two differently designed hybrid PV/T collectors where the performance of PV/T collectors using backside shielding and without using backside shielding is evaluated to know better which building integration option is suitable for cooling applications. The use of backside shielding leads to a higher zero-loss collector efficiency factor and the heat loss coefficient increases that is better for the cooling.…”

Section: Cooling (Air Conditioning)mentioning

confidence: 99%

A Survey on Applications of Hybrid PV/T Panels

Abdin

Rachid

2021

Energies

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Photovoltaic-thermal (PV/T) collectors have gained a lot of attention in recent years due to their substantial advantages as compared to ST or PV systems alone and even to other non-solar technologies. However, PV/Ts are still not as popular in industry or construction and they are not even known to major players implementing solar energy installations. In this article, a general presentation of PV/Ts and a review of their applications are given. First, different heat extraction media (e.g., air, water, bi-fluid, etc.) and hybrid design configurations of hybrid PV/T collectors are addressed. Next, the main applications of PV/T collectors are discussed in order to highlight their feasibility and usefulness and to raise awareness for adoption in the industry and buildings sector. Applications include desalination, air-conditioning, drying, trigeneration, etc. This paper should be considered as a reference form of PV/Ts to extract key points for future research and development as well as for other applications.

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Experimental Analyses of Different PVT Collector Designs for Heating and Cooling Applications in Buildings

Cited by 13 publications

References 4 publications

Systematic testing of hybrid PV-thermal (PVT) solar collectors in steady-state and dynamic outdoor conditions

Systematic testing of hybrid PV-thermal (PVT) solar collectors in steady-state and dynamic outdoor conditions

Applications of radiative sky cooling in solar energy systems: Progress, challenges, and prospects

A Survey on Applications of Hybrid PV/T Panels

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